230 



BIOLOGY OF THE PROTOZOA 



Thus in Gregarinida and in microgametocytes of Coccidiomorpha 

 the nucleus of the cell undergoes se\'eral divisions, the final products 

 arranging themselves about the periphery from which they become 

 nuclei of vari()usl\' formed gametes budded out from the surface 

 (Fig. 179, p. 420). In all such cases the parent protoplasm dies 

 after giving rise to the buds. In some Cnidosporidia, on the other 

 hand, buflding processes appear to be normal activities carried on 



Fig. 111. — Ephelota biUschUnna, a suctorian. Budding individual with five exogen- 

 ous buds. N , branching macronucleus. (After Calkins.) 



during the vegetative life of the organisms. According to Cohn 

 (1895) large numbers of buds, each containing several nuclei, may 

 be formed from the periphery of Myxidium lieherkilhiii. The 

 phenomenon appears to be an exaggeration of the peculiar process 

 .of division termed plasmotomy by Doflein, whereby a multinu- 

 cleated cell divides spontaneously into two more or less equal parts 

 as in Chloromyxvm leydigi according to Liihe and Doflein, or into 

 several parts, as in the Coccidian (Uiri/oiropha )ii('.s'nili and KlossleUa 



